* Does your car have full Japanese history or Japanese logs?
* Do you still have auction and de-reg papers?
* Has your car had regular servicing with Nissan components?
* How many Kms is "low"?
* Is there any rust?
* Since the car has been in Aust for 7 years, how is the paintwork?
* What's the condition of the dash, steering wheel, trim around the rear quarter windows, driver's seat and across the top of the rear seats?
As Ben says, $25K if above Qs are answered positive.